Hello, Codeforces!
If you're developing problems in Polygon, you might like this image to attract attention.
![](/predownloaded/b4/b6/b4b6e46dd5811c89440ee98bce405e54e3b905c6.png)
For the new members of the community, I would like to remind you that Polygon (https://polygon.codeforces.com/) is a system developed and maintained by Codeforces for preparing programming problems. It is there that authors and coordinators develop all the problems for the rounds. Moreover, I believe a significant (large?) portion of the problems for other competitions is also developed there: various stages of ICPC, national competitions of different levels, educational problems for various courses, etc. In 2023, more than 50000 problems were prepared in Polygon (only those for which a package was compiled are counted)!
We often implement such improvements in Polygon that make the process of preparing a problem more reliable. These often include various automatic warnings and tips for problem developers and/or coordinators.
Today I want to talk about two recent such innovations in Polygon.